I have been watching videos from my ipad via ATV2 with no problems. As of yesterday my videos just keep loading and don't play. I don't think I have done anything differently. Does anyone know how to fix this. I have tried unplugging it

Hi, I have been watching videos from my ipad via ATV2 with no problems for over a year. As of yesterday my videos just keep loading and don't play. I don't think I have done anything differently. Does anyone know how to fix this. I have tried unplugging it waiting 30secs and then plugging it back in. I have tried restarting, updating and reseting but nothing is working. It's quite frustrating!!!! Any suggestions????